feat (farm): 设备管理

- 本服务接口
- 对接第三方设备商

yudao-module-farm/src/main/resources/mapper/deviceinfo/DeviceInfoMapper.xml

@@ -9,4 +9,24 @@
         文档可见：https://www.iocoder.cn/MyBatis/x-plugins/
      -->
 
+    <select id="getStatisticsInfo"
+            resultType="cn.iocoder.yudao.module.farm.controller.admin.deviceinfo.vo.v2.DeviceStatisticsRespVO">
+
+        SELECT
+        COALESCE(COUNT(*), 0) AS deviceTotal,
+        COALESCE(SUM(CASE WHEN device_state = 1 THEN 1 ELSE 0 END), 0) AS deviceOnline,
+        COALESCE(SUM(CASE WHEN device_state = 2 THEN 1 ELSE 0 END), 0) AS deviceOffline,
+        COALESCE(SUM(CASE WHEN device_state = 4 THEN 1 ELSE 0 END), 0) AS deviceWarning
+        FROM farm_device_info
+        <where>
+            deleted = b'0'
+            <if test="baseId != null and baseId != ''">
+                AND base_id = #{baseId}
+            </if>
+            <if test="tenantId != null and tenantId != ''">
+                AND tenant_id = #{tenantId}
+            </if>
+        </where>
+
+    </select>
 </mapper>